In this paper, the vibration acceleration of the ballast bed, pillar and cover plate of a typical doubledeck metro depot was measured on site, and the characteristics of the vibration source and its transmission attenuation law were analyzed. The results show that the vibration of each ballast bed and pillar is not much different when the train passes through the first and second layers respectively, but the vibration attenuation of the first track bed-column is relatively large. The predominant frequency of the vibration of the cover plate is mainly concentrated in 30~80 Hz，and the vibration response of the measuring point near the center of the cover plate is greater than that at the end of the cover plate. The vibration response of the upper cover plate caused by the train running on the second floor of the operation zone is larger than that caused by the train running on the first floor. If the upper cover is developed, the vibration reduction design of the second floor should be considered. Whether it is a first-floor or a second -floor driving, the vibration is attenuated in the whole frequency range from the track bed to the column, and the low-frequency part of the vibration energy is easy to cause the resonance of the cover plate.